5
SYSTEM CONTROLS
ROOM THERMOSTAT
The room thermostat should not be positioned near a source of
heat, such as a radiator, or be exposed to direct sunlight, as
this will cause the heating to switch off before the room is up to
the correct temperature. Always follow the manufacturer’s
instructions for the best siting position of the room thermostat.
FROST PROTECTION
If the boiler is to be fitted externally to the property being
heated, the water in the system may be in danger of freezing
and, as such, it is advisable to protect the installation with a
frost thermostat, which will bring the heating on when required.
Where the system is not protected, the heating should be left
switched on and the room thermostat left at a low setting (e.g.
7°C) to prevent the building temperature falling too low.
If the system is shut down for a long period during very cold
weather, it is also advisable to completely drain the system.
However, too frequent draining of the system should be
avoided, especially in hard water areas, as this could lead to
scaling of the boiler waterways.
See
page 7
for flushing and water treatment.
SHUTTING DOWN FOR LONG PERIODS
If the boiler is shut down for any length of time, it is
advisable to have it serviced and thoroughly cleaned as soon
as possible to minimise corrosion of the heating surfaces.
OIL
The oil for your boiler is 28 sec. Kerosene class C2 to BS
2869.
Always ensure that the oil storage tank is topped up regularly;
do not wait until the tank is nearly empty before refilling, as
sludge and water could be sucked into the oil pipe, affecting
the operation of the burner and potentially reducing the life of
the pump.
After a delivery of oil, it is recommended that it be allowed to
settle in the tank for about half an hour before restarting the
boiler.
Sludge and water caused by condensation should be drawn off
at the drain-cock on the oil tank annually.
SIMPLE FAULT-FINDING
If the boiler fails to start for no apparent reason, carry out the
following checks before calling your service engineer:
1. Check for failure in the electrical supply.
2. Check for a blown fuse. If the fuse has blown and the
replacement subsequently blows again, switch off the
mains electrical supply to the boiler and contact your
service engineer.
3. Check that there is adequate oil in the tank and that all
isolation valves are fully open.
4. Check for burner lock-out (see
page 4
).
5. Check for excess water temperature (see high-limit
thermostat details,
page 4
, for further details).
Note:
If the boiler has been shut down due to a failure of the
power supply, it may be necessary to reset the time-
switch or programmer to the correct time, unless the
device has an in-built power reserve.
SERVICING
To ensure the efficient and reliable operation of the boiler it is
essential that the burner be
commissioned
immediately after
installation, and prior to first use. The boiler requires an annual
service thereafter.
IMPORTANT NOTES
1. Only an OFTEC-trained and registered engineer can carry
out commissioning and service work.
2. Electrical safety checks should be carried out by a
qualified electrical engineer.
3. It is the responsibility of the installer to ensure that the
boiler is commissioned immediately after installation.
4. It is a requirement of the guarantee and any extended
warranty that an annual service is carried out.
5. The system water
must
always be protected by a
corrosion inhibitor.